Grangers Clothing Repel adds durable repellency to all waterproof clothing. This easy-to-use, wash-in formula maximises breathability while restoring the performance of all technical fabrics. It reproofs your garment, keeping you warmer and drier for longer. This wash-in reproofer is ideal for all outdoor gear and recommended for all fabrics including Gore-Tex®. How to look after your outdoor clothing | OS GetOutside As you spend time outdoors, the technical features on clothing can start to wear off. Kings of kit care, Grangers, explain how to look care of your outdoor clothing so you can restore its performance and enjoy it for years to come. getoutside.ordnancesurvey.co.uk